钱家营矿近距离煤层群上行开采技术研究

发布时间：2018-09-15 18:53

【摘要】：钱家营矿可采煤层和局部可采煤层共8层,为典型的近距离煤层赋存。井田地质条件复杂、煤层赋存条件差,9煤层为煤与瓦斯突出煤层,此外井田大部分可采储量都被村庄所占压,因此钱家营矿采掘衔接矛盾非常突出。上行开采不仅能解决矿井采掘衔接矛盾,而且可以缓解上部煤层的矿压及煤与瓦斯突出灾害,有利于上部煤层的安全开采。因此对钱家营矿近距离煤层群上行开采煤层围岩活动规律、上覆岩层移动和变形规律以及上、下煤层采动影响的时空关系进行研究,确定采高、层间距、岩性及层间结构、采煤方法、时间等因素对上行开采的影响,提出上行开采巷道布置方案,为钱家营矿上行开采提供技术支撑。论文综合运用理论分析、数值计算和相似材料模拟等手段和方法,研究了钱家营矿六采区上行开采条件下9煤层和12-1煤层的围岩活动规律和煤层及顶底板变形和破坏特征,在此基础上确定了9煤层和12-1煤层采动影响的时空关系并提出了9煤层巷道设计方案。形成六采区上行开采技术,对钱家营矿六采区近距离煤层上行开采具有指导意义。研究表明钱家营矿六采区上行开采是可行的,12-1煤层开采后9煤层的总体形态保持完好,煤柱、运输顺槽和回风顺槽范围内垂直应力增加幅度较大,影响范围为运输顺槽侧内错13 m和外错10 m,回风顺槽侧内错45 m和外错10m,9煤层巷道布置可采用跨煤柱的工作面布置形式。
[Abstract]:There are 8 layers of coal seam and local coal seam in Qianjiaying Mine, which is a typical short distance coal seam. The geological conditions of the mine field are complex, and the coal seam No. 9 is a coal and gas outburst coal seam, and most of the recoverable reserves in the mine field are occupied by the village, so the contradiction between mining and excavation in Qianjiaying Mine is very prominent. Uplink mining can not only solve the contradiction between mining and mining, but also alleviate the mine pressure and the disaster of coal and gas outburst in the upper coal seam, which is beneficial to the safe mining of the upper coal seam. Therefore, in order to determine the mining height, interval, lithology and interlayer structure, this paper studies the law of surrounding rock movement, the movement and deformation of overlying strata, and the temporal and spatial relationship of the influence of mining movement in the upper and lower coal seams in Qianjiaying Coal Mine, in order to determine the mining height, interval between layers, lithology and interlayer structure. The influence of coal mining method and time on uplink mining is put forward to provide technical support for upstream mining of Qianjiaying Mine. By means and methods of theoretical analysis, numerical calculation and similar material simulation, this paper studies the movement law of surrounding rock, deformation and failure characteristics of coal seam and roof and floor under the condition of ascending mining in No. 6 mining area of Qianjiaying Mine. On this basis, the temporal and spatial relationships of the mining effects of coal seam 9 and coal seam 12-1 are determined, and the design scheme of roadway in seam 9 is put forward. The formation of ascending mining technology in six mining areas is of guiding significance to the uplink mining of short distance coal seams in the sixth mining area of Qianjiaying Coal Mine. The study shows that the up-going mining in the sixth mining area of Qianjiaying Mine is feasible. The overall morphology of the 9 coal seams remains intact after mining in the No. 12 ~ (-1) coal seam, and the vertical stress increases greatly in the range of pillar, transportation and return air trench. The influence range is 13m and 10m on the side of the transportation-side along the channel, and the roadway layout of the coal seam with 45 m and 10m- 9 coal seam can be arranged in the form of cross pillar.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD823.81

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